Oil-burner.



J. H. WELCH.

OIL BURNER.

APPLICATION man APR. 11, 1915.

Patented Jan. 11, 1916.

Fig 3 INVENTUR 1/5/02 /7. h elefi WITNESSES:

50/14 A TTOR/VEY CpLUMBIA PLANOORAPH ca, WASHINGTON. D. c.

pip

JOHN H. WELCH,OF SEATTLE, WASHINGTON.

OIL-BURNER.

Specification of Letters Patent.

Application filed April 17, 1915. Serial No. 22,122.

To all whom it may concern Be it known that I, JOHN H. WELoH, citizen ofthe United States, residing at Seattle, in the county of King and Stateof VVaShington, have invented a certain new and useful Improvement inOil Burners, of which the following is a specification.

My invention relates to improvements in burners which are adapted toburn fluid fuel such as crude oil, kerosene, gasolene and the like, butmore particularly relates to such burners that may be employed inconnecticn with stoves for heating or cooking, and the object of myinvention is to provide a burner that shall be simple in its plan ofconstruction, easily cleaned, reliable and efficient in its operationand that shall be adapted to utilize for its fuel different mineral oilproducts, and a further object of my invention is to provide such burnerthat may be readily attached to various forms of stoves and furnacesthat are now in general use. I attain these objects by devicesillustrated in the accompanying drawings wherein Figure 1 illustratesaburner embodying my invention by a view in vertical mid-sec; tion, someparts, however, being shown in side elevation; and Fig. 2 is a plan viewof the same.

Referring to the drawings, throughout which like reference numeralsindicate like parts, a base-plate 4, preferably made of cast iron, isadapted to be disposed to rest' upon and cover the grate (not shown) ofa fire-box of a stove and disposed to rest on such base-plate 4: isa'saucer-like priming pan 5 provided with a centrally disposed hub 6 andextending upwardly through the base-plate 4E and the hub 6 of thepriming pan 5 is a fluid fuel supply pipe 7 which may lead from a valvecontrolled supply of fluid fuel (not shown). Such supply pipe 7 has itsupper end provided with an external screw-thread which screws into a hub8 which is centrally disposed on the convex bottom portion of a hollowfuel receptacle 9, and extending through the top wall of the fuelreceptacle 9 are two conducting pipes 10 and 11, respectively, whichproject upwardly and spirally in engagement with each other thus tosurround a cylindrically formed space, thence each to extend verticallyfor a further distance to project its end through the bottom wall ofanother fuel receptacle 12 and into the interior thereof to a point nearthe top wall thereof, as indicated by dotted lines in Fig. 1.

Extending through the central portion of the bottom wall of the fuelreceptacle 12 is a burner tip 13 whose orifice 14 may serve to directcombustive agents downwardly into and through the cylindrical spacewhich is surrounded by the spirally disposed portion of the pipes 10 and11. The upper end portion of the burner tip 13 extends to a plane nearthe top wall of the fuel receptacle 12 and its open end is closed by acap 15, but through its walls, adjacent to the cap 15, are a pluralityof holes 16 extending therethrough, which holes 16 are disposed atequi-distant circumferential points and such holes 16 are substantiallyin the same plane with the top ends of the pipes 10 and 11.

In the structure thus described, fluid fuel may'pass upwardly throughthe pipe 7 to fill the receptacle 9, thence to flow upwardly through thepipes 10 and 11 to pass into the receptacle 12 wherein such fluid mayrise to flow through hole 16 into the burner tip 13. thence downwardlythrough the orifice 14 to fall on to the top surface of the receptacle9, thence to flow over the edges thereof to drop into the priming pan 5to collect therein until its surface rises to a plane of a.

Patented J an. 11, 1916.

height which will cause such fluid fuel to flow over the edges of a pipe17 which may serve as a drain pipe to conduct away anv excess fluid fuelabove that amount required in the priming pan 5 for heating the burnerin the initial operation of lighting it.

Extending through the central portion of the top wall of the receptacle12 is a conducting pipe 18 which may lead to a valve controlled source,not shown, of compressed air or steam, whereby such compressed air orsteam may be admitted to the interior of the receptacle 12 to impingeupon the top surface of the cap thus to flare out in the form of a sprayto mix with the fuel contained therein and to force the resultantmixture through the burner tip 13 in an obvious manner.

Disposed on opposite sides of the burner are air pipes 19 and 20 whichare provided with fixed collars 21 and 22, respectively, which pipes 19and 20, like the pipes 7 and 17, extend downwardly through the baseplate4: and through the stove grate, not shown, between the bars thereof.Such pipes 19 and 20 are supported in their positions by the collars 21and 22, respectively, and

the upper ends of such pipes 19 and 20 are air that is drawn upwardlythrough them" from the space below the stove grate, not

shown, may be directed toward the point of combustion of the fluid fuel.WVhile have shown only two of such air pipes 19 and 20, it may bedesirable to provide a larger number to be disposed in a concentriccircle around the burner, and under some conditions of operation suchpipes 19 and 20 may be dispensed with.

The operation of my burner is as follows: The valve, not shown,controlling the flow of air through the pipe 18 being closed, the valve,not shown, of the fluid fuel supply pipe 7 is opened to permit fluidfuel to flow through. the burner until such fuel drips into the primingpan 5 there to collect in sufficient amount for heating the burnerwhereupon the flow of such fuel through the pipe 7 is shut off andthereupon the fuel collected in the priming pan 5 is ignited to heat thereceptacle 9, the pipes 10 and 111 and the receptacle 12 to such degreeas will gasify the fuel therein whereupon the resultant gas will issuefrom the orifice 1d and become ignited by the flame rising'froln theprimingpan 5thi1s'to aid in heating the burner and thereupon a properflow of air under pressure or steam isadmitted through the pipe 18 intothe chamber 12, and then liquid fuel through thepipe 7 is again admittedto the burner to flow at a required constant rate to supply the burnerwith liquid fuel at the same rate that it is converted into gas andconsumed, in an obvious manner.

Manifestly changes may be made in the form of a helix, an inclosedreceptacle for fluid fuel I secured to the upper ends of said two pipes,said upper ends of said pipes extending through the bottom wall of saidreceptacle and above the inner surface of the bottomthereof so that saidreceptacle shall be" concentric with said base portion, a pipe adaptedto conduct steam through the central portion of the top wall of saidreceptacle, a burner tip of tubular form removably disposed to extendupwardly I through the bottom wall of said receptacle andjint o thespace therewithin to a plane higher than the inner surface of the bottomwall of said receptacle, a cap disposed to cover the top inner end ofsaid burner tip, and a plurality of passageways disposed-each at adifferent circumferential point to extend through the wall of saidburner tip adjacent to said cap.

In witness whereof, I hereunto subscribe my" na1ne this tenth day ofApril A. 1)., 1915;"

. JOHN H. WELCI-l. Witnesses:

A. HASKINS, O. JOHNSON.

Copies of this patent may be obtained for five cents eaclnby addressingthe Commissioner of Patents. Washington; ID. 0:

